<template>
	<view class="goods-list">
	  <block v-for="(item, i) in goodsList" :key="i" @click="gotoDetail(item)">
	    <!-- 为 my-goods 组件动态绑定 goods 属性的值 -->
	    <my-goods :goods="item"></my-goods>
	  </block>
	</view>
</template>

<script>
	export default {
		data() {
			return {
				//商品列表数据
				goodsList: [],
				//total
				total: 0,
				queryObj: {
					query:'',
					cid:'',
					pagenum: 1,
					//pagesize
					pagesize: 10,
				},
				//默认空图片
				defaultPic: 'https://img3.doubanio.com/f/movie/8dd0c794499fe925ae2ae89ee30cd225750457b4/pics/movie/celebrity-default-medium.png',
				// 节流阀
				isloading: false,
			};
		},
		onLoad(options) {
			//将页面参数转存到对象中
			this.queryObj.query = options.query || ''
			this.queryObj.cid = options.cid || ''
			
			//调用获取商品列表数据方法
			this.getGoodsList()
		},
		methods: {
			//获取商品列表数据方法
			async getGoodsList(cb) {
				this.isloading = true
				const {data: res} = await uni.$http.get('/api/public/v1/goods/search', this.queryObj)
				this.isloading = false
				//只要数据请求完毕，就立即按需调用方cb回调函数
				cb && cb()
				if (res.meta.status !== 200) return uni.$showMsg()
				
				//赋值  新旧数据拼接
				this.goodsList = [...this.goodsList, ...res.message.goods]
				this.total = res.message.total
			},
			gotoDetail(item) {
				uni.navigateTo({
					url: '/subpkg/goods_detail/goods_detail?goods_id=' + item.goods_id
				})
			}
		},
		onReachBottom() {
			//判断是否还有下一页
			if (this.queryObj.pagenum * this.queryObj.pagesize >= this.total) return uni.$showMsg('数据加载完毕')
			//判断是否请求其他数据
			if (this.isloading) return
			
			// 让页码值自增加1
			this.queryObj.pagenum += 1
			// 重新获取列表数据
			this.getGoodsList()
		},
		onPullDownRefresh() {
			//重置数据
			this.queryObj.pagenum = 1
			this.total = 0
			this.isloading = false
			this.goodsList = []
			
			//重新发起请求
			this.getGoodsList(() => uni.stopPullDownRefresh())
		}
	}
</script>

<style lang="scss">

</style>
